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Anatomy of the skin
The anatomy of the skin describes the structure of the skin (Lat. cutis) as a limit organ which takes over various functions. It is built up in principle at once with all vertebrates including man. The thickness of the individual layers is dependent on the respective skin region.
The epidermis or "top skin" is part of the Epithelgeweben, it is a layered verhornendes Plattenepithel which is 0.03 to 0.3 millimeters thick. The following layers can be distinguished from inside to the outside:
Stratum basale
The Stratum basale, the "Basalzellschicht", serves the regeneration of the skin as the one-layer innermost cell layer, cell divisions take place here. The nutrient supply is here comparatively still good. The demarcation to the dermis lying under this is made by a Basalmembran as in the case of all epitheliums in the last skin which largely flatly goes in the Felderhaut but is deformed by papillae strongly whose density the structure of the skin lasts provides.
Stratum spinosum
The cells are connected in the Stratum spinosum also described "as a thorn cell layer" in numerous places with each other. You get a thorny appearance through this. The Verhornung (Keratinisierung) already starts here.
Stratum granulosum
The reduction of the cells already starts in this "corner cell layer" progressing, with Verhornung they change gradually in lifeless Keratinozyten. The outer form plattet gradual and himself the cell inside gets more and more dominates of Keratingranula as of. The nucleus of a cell isn't abgrenzbar as well as in the Stratum spinosum.
Stratum lucidum
Stratum lucidum also named as a "gleam layer" is a cell layer looking very uniform under the microscope which distinctively occurs the hands and feet only at the last skin this. It has the task of representing a barrier against all forms of intruders into the skin. It consists of an oily layer for the most part with lower breaking differences. It is hardly trained and therefore recognize cell stripes under the almost unstructured Stratum corneum and form the transition layer to the strongly inhomogeneous corner cell layer also only as thin andersfärbiger in the Felderhaut.
Stratum corneum
The epidermis is carried out the transition in the Stratum corneum, the outermost layer abruptly. The now completely horny Korneozyten are forming the "horn cell layer" now which can between 12 and 200 cell layers thickly be depending on region as "horn cells". The cells of this epidermis layer are numbly and containedly no more cell organ ulnae. Greases between the cells form a water cold protective layer together with the horn cells.
Stratum disjunctum
The Stratum disjunctum is the quota of the Stratum corneum in which come loose the horn cells from each other and imperceptibly of the skin abschilfern by the contacts dissolving between the cells. If this process is incompletely carried out, the "cell loss" gets visible as Schuppung. This topmost layer of the cornea has another contrast than the below it lying material by air storages.
These informations may be considered a substitute for a piece of medical advice in no case. The content of this site doesn't can and may be put into any case to make diagnoses or carry out self medical treatment independently.
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